Internal combustion engine



V "1June4, 1940.

Filed laren s, 19:58`

` wengine of the above typej. With this object in I d I have devised` an internal combustion I engine with two cylinders arranged I sideby side i serted in the cylinder.

` new Jule N ,Ummm

II `imviews l I TheIIpresent invention relates i Ibustion enginesgof the kind comprising twbwork- 1 ing cylinders arrangedyside lfbytsiide,I there being two Ioppositely `working pistons `in each cylinder,

`1| andfthevmovement of thetfourn` pistons being i transmitted to a commonshaft. It is known in connection with engines of thistype to use either` I the `outermostspaces between the coversof `the cylinders and the pistons.;I `or "the I innermost spaces between the said members as combustion chambers, and to transmit the movement `of the pistons `to a common shaft by linkage arranged I entirely outside the cylinderssaid linkage being: I I connected with pins or projections of the pistons" I v1li` guided in slots of the cylinder sides projecting onI i s the outside through these slots.

y Engines of this type may Ibeworked either as twoor fourL-stroke engines. l v I 1, The objectof the present invention is to provide an improved, simplified and verycompact view,

I and` parallel to one another, `tw0 `(iIJliOsitely work- Ifzingpistons in each cy1inder,yone Icombustion chamber at each end of each cylinder and one I combustion chamber #between thetwopistons in each cylinder, `each piston being provided with connecting` corresponding pins, aI crank shaft arranged between said cylinders `parallel tosaid pins, and connecting rods connecting said trans- Vverse members withcranks of saidlcrank shaft.

The two pins of each piston may obviouslybe through the `cylinder and gidedinslots. The

pins or the transverse rod replacing same are,

fixed to the pistons after theIlatter have beeninan; integral` block, the whole construction being particularlysuitable for small engines. Several units, each comprising two cylinders with four pistons, may be arrangedsidebyside to, form a;

` Fig. 1 isan elevation of the engine, one cylinder andIone piston being shown in section, and

outwardly projecting pins, transverse members' substituted by a single transverse rod passing I Each cylinder, and in j some cases both cylinders, may be constructed as l Fig.`2` a section on line II-d-I-II of Fig. 1, a part I y was another side byI sideand are rigidly connected by cast on members 5 and 6, the latter members servingatthesame time `as bearings for a crankshaft 1. Each cylinder is provided at the ends `with covers 8, `8 fitted with atomisers 9,9, and i with an atomiser III in the central position cor- `respondingto the intermediate combustion chamber thereof. In each cylinder there are two pistons, each piston having two ends II and I2 con-I I nected `by a connecting body I3. The arrangei ment is such Ithat each cylinder is provided with three `combustion chambers, namely one inner chamber formedvbetween and common to the ends I2 of the pistons andone chamber at each outer end ofthe cylinder for the end II of each piston.` The piston ends II and I2 are as usual provided with piston rings I6 and I1. In each II iazoaus V m'rnnNAnjcoimUs'rroN nNGlNEfI i comen; ,I ,s i Netherlands I "Application anche. lssaseiairraflcacss II mgl? N'M'Mn www 19,37I`I f I (c1`.1iza:s1) Y I I I ,I i. lof lthescylinderbeing,broken away to show a piston.. i, I Referring `to the"d`raW`ing,II,`2 indicates the first Icylinder;an`df 8,4@ indicates I the second cylinder. ,i I Thesefcylinders are arranged parallel to one connecting body I8 are fixed pins or projections Ilmwhich extend outside the cylinders through slots Il formed in the cylinder sides, and are provided for the purpose of connecting each pin to a transverse member I8 `or` I9 (one pair of pins being connectedto member I8 and the other pair to member I9), whichmembers are themselves connected by means oi'` rods 20 andl ZI which transmit `themovement of the members I8 and I I9 to thecrank shaft 1' through the medium of connecting rods 12'I` and 28 respectively, the said rods I21 and 28' on either side working upon a ,double crank of the shaft 1 as shown. It will be seen `that the distance between the cylinders is very small and that the masses of the moving "partsj are completely balanced. Ports 22 andI28 d are provided for the inlet and outlet of the gases into and from the workingspaces at the.ends of the cylinders, whilst ports 24 and 25` are provided forth inlet and outlet of the gases into and from the inner workingI`spaces between the adjacent endsof each two pistons. In order to provide sumcientI bearing surface for the pins Il, the cylinder walls are provided with thickened por-I tions "or guides 26 around the slots. It will be I understoodthat instead of two pins fixed tothe cylinder, a single rod passing through the body I 3V could be used. Any suitable cooling means .such as iscommonly used in internal combustion engine practice may be provided.

The operation is as follows: Is

After the engine has been started, the pistons on moving from the position shown towards the cylinder covers close by means of their outer ends the outlet ports, whereupon air is compressed.

' During this movement the pistons open by means of the inner endsthe ports 24 and 25 causing comn bustion gases. to be expelled and fresh air to be drawn in. Upon the pistons nearly reaching their A outer positions and the oompressionl being a maximum, fuel is injected throughvthe nozzles or atomisers 9 and is either automatically ignited owing to the'high temperature occurring, ror is ignited by means o! ignition plugs. In each space between the two pistons of a cylinder, the same working operation takes place as at the l cover ends of the cylinders, fuel being injected through nozzles III. During the return movementv the pistons expel the combustion gases through a double ycrank ofthe cranio'Y shaft so that the powerfofl the four pistons is transmitted to the crankfshaftin a verysimple manner, the cranks ,of oppositelyarranged pistons being displaced through 'an angle ofl 180.

nfwiuf be evident that with this arrangement after-each halfrevolutlon an explosion occurs, so that each piston is driven by the torce of an explosion from one end position to the other.

" If the invention is appliedto a fours-stroke" enginefit will, of course, be necessary to provide s control valves for the inlet and outlet ports. `Iclaim:V l

In f ari` internal combustion engine the combination of: two cylinders arranged side by side and .parallel'to one another, two oppositely working pistons inV each cylinder; and each cylinder'hav- "ing onevcombustion chamber at' each end thereof :and` a' third combustion chamberr between the adjacent ends ot the pistons'therein; leach pistonM being provided with outwardly. projecting pins;

"transverse'members connecting the pins of veach piston in one cylinder with the corresponding pins of the `correspondingpiston in said other cylinder;

said cylinders parallel to saidpins; and connecting rods connecting saidtransverse members with 'cranks ofl'said fcranlrfshatt. y l

a crank shaft arranged externally of and between 

